package com.heima.wemedia.service.impl;

import cn.hutool.core.collection.CollUtil;
import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.apis.article.IArticleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.common.tess4j.Tess4jClient;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.common.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmChannelMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
@Transactional
public class WmNewsAutoScanServiceImpl implements WmNewsAutoScanService {
    @Autowired
    private WmNewsMapper wmNewsMapper;

    @Autowired
    private GreenImageScan greenImageScan;

    @Autowired
    private GreenTextScan greenTextScan;

    @Autowired
    private FileStorageService fileStorageService;

    @Autowired
    private IArticleClient articleClient;

    @Autowired
    private WmChannelMapper wmChannelMapper;

    @Autowired
    private WmUserMapper wmUserMapper;

    @Autowired
    private WmSensitiveMapper wmSensitiveMapper;

    @Autowired
    private Tess4jClient tess4jClient;

    /**
     * 自媒体文章审核
     *
     * @param id 自媒体文章id
     */
    @Async  //标明当前方法是一个异步方法
    @Override
    public void autoScanWmNews(Integer id) {
        //1.查询自媒体文章
        WmNews wmNews = wmNewsMapper.selectById(id);
        if (wmNews == null) {
            throw new RuntimeException("WmNewsAutoScanServiceImpl-文章不存在");
        }
        //从内容中提取纯文本内容和图片
        Map<String, Object> map = handleTextAndImages(wmNews);

        //自定义敏感词过滤
        boolean isSensitive = handleSensitiveScan((String) map.get("content"), wmNews);
        if (!isSensitive) return;
        //2.审核文本内容  阿里云接口
        boolean isTextScan = handleTextScan(map.get("content"), wmNews);
        if (!isTextScan) return;
        //3.审核图片  阿里云接口
        //boolean isImageScan = handleImageScan((List<String>) map.get("images"), wmNews);
        //if (!isImageScan) return;
        //4.审核成功，保存app端的相关的文章数据
        ResponseResult responseResult = saveAppArticle(wmNews);
        if (!responseResult.getCode().equals(200)) {
            throw new RuntimeException("WmNewsAutoScanServiceImpl-文章审核，保存app端相关文章数据失败");
        }
        //回填article_id
        wmNews.setArticleId((Long) responseResult.getData());
        updateWmNews(wmNews, (short) 9, "审核成功");
    }

    /**
     * 敏感词过滤
     *
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleSensitiveScan(String content, WmNews wmNews) {
        boolean flag = true;
        //获取所有的敏感词
        List<WmSensitive> sensitives = wmSensitiveMapper.selectList(Wrappers.<WmSensitive>lambdaQuery().select(WmSensitive::getSensitives));
        List<String> list = CollUtil.getFieldValues(sensitives, "sensitives", String.class);
        //初始化敏感词库
        SensitiveWordUtil.initMap(list);
        //查看文章中是否包含敏感词
        Map<String, Integer> map = SensitiveWordUtil.matchWords(content);
        if (map.size() >= 0) {
            updateWmNews(wmNews, (short) 2, "当前文章存在违规内容");
            flag = false;
        }
        return flag;
    }

    /**
     * 保存app端相关数据
     *
     * @param wmNews
     * @return
     */
    private ResponseResult saveAppArticle(WmNews wmNews) {
        //属性拷贝
        ArticleDto dto = new ArticleDto();
        BeanUtils.copyProperties(wmNews, dto);
        //文章的布局
        dto.setLayout(wmNews.getType());
        //频道
        WmChannel wmChannel = wmChannelMapper.selectById(wmNews.getChannelId());
        if (wmChannel != null) {
            dto.setChannelName(wmChannel.getName());
        }

        //作者
        dto.setAuthorId(wmNews.getUserId().longValue());
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());
        if (wmUser != null) {
            dto.setAuthorName(wmUser.getName());
        }
        //设置文章id
        if (wmNews.getArticleId() != null) {
            dto.setId(wmNews.getArticleId());
        }
        //设置时间
        dto.setCreatedTime(new Date());

        //调用feign api接口
        ResponseResult result = articleClient.saveArticle(dto);
        return result;
    }

    /**
     * 阿里云审核图片
     *
     * @param images
     * @param wmNews
     * @return
     */
    private boolean handleImageScan(List<String> images, WmNews wmNews) {
        boolean flag = true;

        if (images == null || images.size() == 0) {
            return flag;
        }

        //下载图片 minIO
        //图片去重
        images = images.stream().distinct().collect(Collectors.toList());

        List<byte[]> imageList = new ArrayList<>();

        for (String image : images) {
            byte[] bytes = fileStorageService.downLoadFile(image);
            imageList.add(bytes);
        }

        try {
            //下载图片
            for (String image : images) {
                byte[] bytes = fileStorageService.downLoadFile(image);
                //将bytes[]转换为butteredImage
                ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
                BufferedImage imageFile = ImageIO.read(inputStream);
                //识别图片文字
                String result = tess4jClient.doOCR(imageFile);
                //检查是否存在自管理的敏感词
                boolean isSensitive = handleSensitiveScan(result, wmNews);
                //违规返回false，敏感词审核不通过，阿里云图片审核不通过返回false，
                if (!isSensitive) {
                    return isSensitive;
                }
            }
            //审核图片
            Map map = greenImageScan.imageScan(imageList);
            if (map != null) {
                //审核失败
                if (map.get("suggestion").equals("block")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容");
                }

                //不确定信息  需要人工审核
                if (map.get("suggestion").equals("review")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定内容");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }
        return flag;
    }

    /**
     * 阿里云审核文本
     *
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleTextScan(Object content, WmNews wmNews) {
        boolean flag = true;

        if ((wmNews.getTitle() + "-" + content).length() == 0) {
            return flag;
        }

        try {
            Map map = greenTextScan.greeTextScan((wmNews.getTitle() + "-" + content));
            if (map != null) {
                //审核失败
                if (map.get("suggestion").equals("block")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容");
                }

                //不确定信息  需要人工审核
                if (map.get("suggestion").equals("review")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定内容");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }

        return flag;
    }

    /**
     * 更新WmNew内容
     *
     * @param wmNews
     * @param status
     * @param reason
     */
    private void updateWmNews(WmNews wmNews, short status, String reason) {
        wmNews.setStatus(status);
        wmNews.setReason(reason);
        wmNewsMapper.updateById(wmNews);
    }

    /**
     * 1.从自媒体文章的内容中提取文本和图片
     * 2.提取文章的封面图片
     *
     * @param wmNews
     * @return
     */
    private Map<String, Object> handleTextAndImages(WmNews wmNews) {
        //存储纯文本内容和图片
        StringBuilder stringBuilder = new StringBuilder();
        //存储封面图片
        List<String> images = new ArrayList<>();
        //从自媒体文章的内容中提取文本和图片
        if (StringUtils.isNotBlank(wmNews.getContent())) {
            List<Map> maps = JSONArray.parseArray(wmNews.getContent(), Map.class);
            for (Map map : maps) {
                if (map.get("type").equals("text")) {
                    stringBuilder.append(map.get("value"));
                }

                if (map.get("type").equals("image")) {
                    images.add((String) map.get("value"));
                }
            }
        }
        //提取文章的封面图片
        if (StringUtils.isNotBlank(wmNews.getImages())) {
            String[] split = wmNews.getImages().split(",");
            images.addAll(Arrays.asList(split));
        }
        //将文本信息和图片信息存入map返回
        Map<String, Object> resultMap = new HashMap<>();
        resultMap.put("content", stringBuilder.toString());
        resultMap.put("images", images);
        return resultMap;
    }
}
